<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap demo</title>
    <link href="bootstrap-5.3.3-dist/css/bootstrap.min.css" rel="stylesheet">
  </head>
  <body>
    
    <div class="container">
      <div class="row" style="background-color: red;">
        <div class="col-lg-6">
          内容
        </div>
        <div class="col-lg-6">
          内容
        </div>
        <div class="col-lg-6">
          内容
        </div>
      </div>
    </div>





    <script src="bootstrap-5.3.3-dist/js/bootstrap.min.js" ></script>
  </body>
</html>